Battery container



June 10. 1924.

J. M. AHLGREN BATTERY CONTAINER Filed July ll. 1921 l N VEN TOR.

JOHN /Z ,4M e/Y.

A TTORNEY.

Patente .lune l0, 1924,.

Application filed .lilly l1, 1921. Serial llo. dtl.

To all whom it 'may concern:

Be it known that l, JOHN M. AHLGREN, a citizen of the United States,residing at indianapolis, in the county ot Marion and State of indiana,have invented certain new and useful improvements in Battery Containers,o" which the following is a'specilication.

This invention relates to storage battery containers and is a furtherdevelopment ot the art over my former Patents, #1,306,679, issued dune17, 1919, and #1,341,871, issued lune 1, 1920, and the'prime feature otthe present invention, in addition to forming a complete unitaryone-piece container, is in impregnating the material of which thecontainer is formed, with an acid resisting substance, therebyvsimplifying theconstruction shown in my former patents,'vvithoutdetracting from the strength or acid resisting qualities thereof,

A further feature oir' the invention is in forming the parts ont thecontainer of such substance or substances as may be readily shaped toforma container when in a pliable condition, all the parts of which areintegrally connected with each other and forming a one piece structure.

A further feature of the invention is the provision of means orsubstances, which, when added to the container forming body material,will resist cracking tendencies and increase the cohesiveness andtoughness of the substances forming the walls and partitions of thecontainer, at the same time providing a limited resiliency or give 'tothe structure, so that strains to which the container may be subjectedwhen used in connection Wlth an automobile, will not tend to effect orin any manner form leakage spaces through the Walls or partitions of thecontainer.

' @ther objects and advantages Will be hereinafter more fully set forthand pointed out in the accompanying specification.

In the accompanying drawings,v

Figure 1 is a longitudinal sectional View through acontainer, and DFigure 2 is a transverse sectional view throu h` the container.

Re erring to the drawings, ,1 indicates the side and end Walls of thecontainer; 2.

the partition Wall therefor; and 3 indicates supporting ribs for thebattery plates, thel body composition of said parts being formedIparticles, and to these particles is added sulphur and litharge forfilling the interstices or pores of the body and rendering the productimperviousto acids used in battery constructions. In compounding theingredients approximately 80 per cent o rubber is used to which is addedsubstantially 5 per cent of asbestos or linen ber,

5 per cent of sulphur and 10 per cent of litharge.

'llhis compound is mixed or treated in a till set of regulation rubbermixing rolls, and

then calendered to the proper thickness to form the various parts of thecontainer yWhen properly shaped, or a molding process may be employed informing the container, in which molds are used, as set out in my formerPatent 1,306,679, the composition being treated. while still in aplastic state.

ln either instance the product is so treated that When reduced to theforno. of a con# tainer, a sin le one-piece concrete structure vvill bepro uced thereby, eliminating any joints or points ot union subject toseparation when subjected to strains incident to usage; consequently noseams will develop through which the liquidl contents et the containermight escape.

The addition of the ber to the rubber content together with sulphur andlithargerenders the product very cohesive and tough, so that althoughthe p arts of the container may have a very limited give or resiliency,yet an extremely durable structure will be provided, owing to the t'actthat the container is in one piece, and the addition ot' the otherelements renders the product acid proof, and serves to more uniformlycement the product together.

it will thus be seen that l have not only provided as ecient a structureas formerly, but have greatly simplified the structure and materiallyreduced the cost ci production, and yWithout detracting from thestrength and durability ci the completed article,

' Furthermore, the acid resisting qualities of the composition will beasfully conserved by placing the acid resistin properties di- -rectlyWithin and making t e same a part of the compound, as would beaccomplished by forming an acid resisting lining interiorly andexteriorly of the container.

It is to be understood that my invention extends to equivalentsubstances as well as to those referred to by name and that the claims4are to be construed accordingly even though speciic terms are usedtherein such terms being for clearness and not for limitation.

VThe invention claimed is 1. A battery box molded out of acompoundcomprising comminuted rubber, asbestos, sulphur and litharge,substantially .as set forth.

2. An integral battery box molded out of plastic material comprisinvcomminuted rubber, a librous binder, and acid-resisting material,substantially as set forth.

3. An integral battery box molded out of plastic material comprising arelatively lar e proportion of comminuted rubber, an smaller proportionsof a fibrous binder and acid-resisting material, substantially as setforth.

In Witness whereof, I have hereunto set my hand and seal at Chicago,Illinois, this 5t day of July, A. D. nineteen hundred and twenty\.one.

Y JOHN M. 'AHLGREN [a a] Witnesses:

MAxIN Farm, I-I. R. FULLER.

